Barcelona / independent build log
Growth marketer and builder. Ships fast, reads the numbers, kills what does not work, and repeats.
About
Zakariae Boussaidi, Mr Zak online, is a self-taught developer and growth marketer based in Barcelona. He learned by building, shipping, measuring, and killing what doesn't work.
He studied IT at 42Barcelona and is working through a CS degree at University of the People. The stack is practical: Google Ads, Meta Ads, Flutter, React, Firebase, Figma, Vercel, GitHub, and no-code tools when speed beats ceremony.
Operating history
Shipping counts. Growth counts. Killing a bad bet before it burns cash counts too.
01
Hyperlocal map app for Barcelona: live deals, free food, urgent offers from local businesses, real-time and auto-expiring. Solo build, started in 2026, under 2 months old.
02
Flutter and Firebase mobile memories app. Solo-founded and built, currently in active development.
03
Digital marketing agency he founded and ran. Managed Google and Meta Ads campaigns for 5+ B2B and B2C clients.
04
Viral content platform grown from zero to 3,000+ monthly active users through pure organic strategy.
05
Halloween e-commerce store that hit 1,000+ orders in a single season, built with zero prior e-commerce experience.
06
Flutter language-learning app killed before launch after cost analysis showed the unit economics did not work. Stopping there was the win.
Toolbox
01 / growth
02 / build
03 / language
